Table 4. Joint effect of LRTIs (≥1 infections) experienced during the past 12 months and personal allergic diseases (currently or in the past) on the risk of asthma.
| Allergy | LRTI | Crude OR (95% CI) | Adjusted OR (95% CI)a | Excess risk (%) |
| No | No | 1 | 1 | |
| Yes | No | 1.93 (1.49–2.50) | 1.98 (1.49–2.62) | 98 |
| No | Yes | 7.65 (4.81–12.16) | 8.49 (5.16–13.97) | 749 |
| Yes | Yes | 11.69 (7.63–17.90) | 11.38 (7.25–17.85) | 1038 |
a
Adjusted for sex, age, education, smoking, SHS exposure (work/home), pets, and exposure to mold (work/home).